Is there any reason to think the Trojans were Etruscan? Even if you think Etruscan came from that region, there seems no reason to specify Troy.
For one thing, since the Greeks were happy fingering the Lemnians and Imbrians as weirdos, you'd have thought they might have mentioned if they were Trojan. Instead, they gave them an entirely different origin.
But I think west-east makes more sense. There are apparently some people who have suggested that the Etruscans came from across the Adriatic, but only from as far away as Dalmatia. Dalmatia would indeed be a very believable place for a pre-IE language family to find refuge. A move from Dalmatia to Italy to the Alps seems rather less peculiar than one from Anatolia to Italy to the Alps - indeed, if Dalmatia is the origin, you could even allow two different migrations, one to form Etruscan and one to form Rhaetic, if indeed those languages are more divergent. The Tyrrhenian presence in the Aegean would then be a secondary, maritime expansion - not implausible, since the northern Adriatic has a history of maritime proficiency (think the Liburnians, Paganians, Venetians...), particularly appealing if Lemnian is indeed closer to Etruscan than Raetic is. And it seems to make more sense to suggest that a race of semi-civilised Adriatic pirates might migrate into the prosperous Aegean/Anatolian sphere, than that a race of sophisticated Anatolians would take to their boats, sail west into the darkness, land in barbarous Italy, set up a new civilisation, and then migrate again up into the Alps. That narrative just isn't as understandable to me!
The east-to-west hypothesis also has the problem of crowding. Imagine the poor Etruscans sitting in Troy and surrounding areas. The Anatalians sweep through their lands from the Balkans; perhaps the Armenians come through as a second wave. Greeks flood in later on. The Phrygians march through. Thracian bands roam. Minoans occupy the sea, at least for a while. Putting them in Troy is basically putting a chicken in the middle lane of a motorway...
Whereas the other scenario has: they hang around in Dalmatia, while the Italics populate Italy; they spread across the Adriatic and populate northern Italy, pushing up into the Alps; at some point, with chaos having fallen on the east, some of their merchants go east and settle on some unhinhabited islands there; the Celts come south (and Illyrians come west) and take away much of their lands, isolating them in Tuscany.
But the river tripped on her by and by, lapping
as though her heart was brook: Why, why, why! Weh, O weh
I'se so silly to be flowing but I no canna stay!